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Finding the Fourth Proportional to 104,486.80, 156,730.20 and 102,931.60

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Solution

The fourth proportional to 104,486.80, 156,730.20 and 102,931.60 is: 154,397.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,486.80 : 156,730.20 = 102,931.60 : x
  2. Step 2: Convert to fraction form
    104,486.80/156,730.20 = 102,931.60/x
  3. Step 3: Cross multiply
    104,486.80x = 156,730.20 × 102,931.60
  4. Step 4: Simplify right side
    104,486.80x = 16,132,490,254.32
  5. Step 5: Solve for x
    x = 16,132,490,254.32/104,486.80
  6. Step 6: Final answer
    x = 154,397.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.